BENZOFURANONE AND BENZODIFURANTRIONE DERIVATIVES AND PROCESS FOR THE PREPARATION OF BENZODIFURANONES.

摘要

PCT No. PCT/GB93/02318 Sec. 371 Date May 25, 1995 Sec. 102(e) Date May 25, 1995 PCT Filed Nov. 11, 1993 PCT Pub. No. WO94/12501 PCT Pub. Date Jun. 9, 1994Benzodifurantriones of Formula (1): tituted aryl, a process for their preparation via dioxo intermediates and processes for their conversion into benzodifuranone dyes and compounds of Formula (7): Formula (7) are provided wherein R3 is -H, -COR2, -SO2R2- which R2 is alkyl, cycloalkyl, aryl or aralkyl and R4 is -COOR2, -CONRR1 in which R and R1 each independently is -H, alkyl, cycloalkyl, aryl or aralkyl; -COOH or the alkali metal, alkaline earth metal or ammonium salts thereof; or -COX2- which X2 is halo.